CVE-2022-20817

What it is

A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering.

Exploit odds

1.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-06-15 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:25 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.2% in the next 30 days (EPSS).
• Severity: 7.4 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-06-15 18:15 UTC

Last modified

2026-06-17 04:25 UTC

Exploit probability

1.2% · EPSS, next 30 days

Weakness

CWE-338

Record status

Modified

Affected

• Cisco Unified Ip Phone 6911 Firmware
• Cisco Unified Ip Phone 6921 Firmware
• Cisco Unified Ip Phone 6941 Firmware
• Cisco Unified Ip Phone 6945 Firmware
• Cisco Unified Ip Phone 6961 Firmware
• Cisco Unified Ip Phone 8941 Firmware
• Cisco Unified Ip Phone 8945 Firmware
• Cisco Unified Ip Phone 8961 Firmware

Attack profile CVSS 3.1 · 7.4

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-20817.md and follow it. Check whether this project is affected by CVE-2022-20817. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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